最近做了一個前端項目，其中有需求：通過button直接把input或者textarea里的值復(fù)制到粘貼板里。下面小編把我實現(xiàn)思路及代碼分享給大家，大家可以直接引入項目中。
    具體代碼如下所示：
    function copyToClipboard(elem) {
    // create hidden text element, if it doesn't already exist
    var targetId = "_hiddenCopyText_";
    var isInput = elem.tagName === "INPUT" || elem.tagName === "TEXTAREA";
    var origSelectionStart, origSelectionEnd;
    if (isInput) {
    // can just use the original source element for the selection and copy
    target = elem;
    origSelectionStart = elem.selectionStart;
    origSelectionEnd = elem.selectionEnd;
    } else {
    // must use a temporary form element for the selection and copy
    target = document.getElementById(targetId);
    if (!target) {
    var target = document.createElement("textarea");
    target.style.position = "absolute";
    target.style.left = "-9999px";
    target.style.top = "0";
    target.id = targetId;
    document.body.appendChild(target);
    }
    target.textContent = elem.textContent;
    }
    // select the content
    var currentFocus = document.activeElement;
    target.focus();
    target.setSelectionRange(0, target.value.length);
    // copy the selection
    var succeed;
    try {
    succeed = document.execCommand("copy");
    } catch(e) {
    succeed = false;
    }
    // restore original focus
    if (currentFocus && typeof currentFocus.focus === "function") {
    currentFocus.focus();
    }
    if (isInput) {
    // restore prior selection
    elem.setSelectionRange(origSelectionStart, origSelectionEnd);
    } else {
    // clear temporary content
    target.textContent = "";
    }
    return succeed;
    }
    我們可以這樣直接調(diào)用這個方法：
    copyToClipboard(document.getElementById("name"));
    這樣id為name的值進(jìn)入了粘貼板了。
    關(guān)于JavaScript實現(xiàn)復(fù)制內(nèi)容到粘貼板代碼小編就給大家介紹到這里，希望對大家有所幫助！